MAREDER, K. (1970). Practical Economics K.b. Mareder. MacDonald & Evans.
Lua i Stíl Chicago (17ú heag.)MAREDER, K.B. Practical Economics K.b. Mareder. MacDonald & Evans, 1970.
Lua MLA (8ú heag.)MAREDER, K.B. Practical Economics K.b. Mareder. MacDonald & Evans, 1970.
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